org.apache.hadoop.hbase.replication

Interface WALEntryFilter

All Known Implementing Classes:

BaseWALEntryFilter, ChainWALEntryFilter, ClusterMarkingEntryFilter, NamespaceTableCfWALEntryFilter, ScopeWALEntryFilter, SystemTableWALEntryFilter

@InterfaceAudience.LimitedPrivate(value="Replication")
public interface WALEntryFilter

A Filter for WAL entries before being sent over to replication. Multiple filters might be chained together using ChainWALEntryFilter. Applied on the replication source side.

There is also a filter that can be installed on the sink end of a replication stream. See WALEntrySinkFilter. Certain use-cases may need such a facility but better to filter here on the source side rather than later, after the edit arrives at the sink.

See Also:

for filtering replication on the sink-side.

Method Summary

Modifier and Type	Method and Description
WAL.Entry	filter(WAL.Entry entry) Applies the filter, possibly returning a different Entry instance.

Method Detail

filter

WAL.Entry filter(WAL.Entry entry)

Applies the filter, possibly returning a different Entry instance. If null is returned, the entry will be skipped.

Parameters:

entry - Entry to filter

Returns:

a (possibly modified) Entry to use. Returning null or an entry with no cells will cause the entry to be skipped for replication.